People stand near armed men on an armoured personnel carrier in Slaviansk April 16, 2014. At least three armoured personal carriers that were driven in to the eastern Ukrainian city of Slaviansk had been under the control of Ukrainian armed forces earlier on Wednesday, Reuters photographers said. REUTERS/Gleb Garanich (UKRAINE - Tags: MILITARY POLITICS CIVIL UNREST)

People stand near armed men on an armoured personnel carrier in Slaviansk April 16, 2014. At least three armoured personal carriers that were driven in to the eastern Ukrainian city of Slaviansk had been under the control of Ukrainian armed forces earlier on Wednesday, Reuters photographers said. REUTERS/Gleb Garanich (UKRAINE - Tags: MILITARY POLITICS CIVIL UNREST)